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CYLINDER PRINTING-PRESS.

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TO ALL WIIOM IT MAY CONCERN: y

Be it known that I, HENRY lC. CHANDLER, of Indianapolis, in the countyof Marion, and State of Indiana, have invented new and usefulImprovements in Cylinder' Printing-Presses; and I do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawing, making part of thisspecification.

My invention relates to the mode of reciprocating the form-bed ofprintingpress-es ofthe kind known as cylinder presses; and consists inthe employment of segmental cog-bars en the-ends ofthe revolvingimpressioncylinder, which engage with straight cog-bars on the ends ofthe bed, to carry it under the cylinder in the process of making theimpression, by which their conjoint movement isclfect'ed with greaterprecision, and the liability to make blurred or imperfect impressionslessened, and also in givingthc bed a quick return-movement by meansindependent of that which carries it under the impression-cylinder.

Figure 1 is a. vertical longitudinal section, and

Figure 2 is a top view of the press.

A is the framework; B the form-bed; C, impression-cylinder; D,carriage-way, and E the feed-board; all of which may be constructed andarranged in any manner common or applicable to presses of this kind.Other parts of the press, not having any particular relation to myinvention, are not shown, in order that my improvements may be moreclearly exhibited. G are segmental cog-bars attached to the ends of; theimpression-cylinder C, and F are straght cog-'bars attached to the endsof the form-bed B. These cog-bars are arranged in the proper positionand relation to engage with each other and carry the bed. B under theimpression-cylinder at each revolution. In order to provide for the easyand certain engagement of the segmental cog-bars Gr with cog-bars F, thelatter are furnished with notched standards R at their rear ends, withwhich pins S, in the ends of the cylinder, engage as it reyolves, andstart thc bed on its backward movement. The return ofthe hed-with aquick movement is effected by means of the vibrating arm II, actuated bycrank I on shaftvK of cog-wheel L, which is intermediate of thedrivingcog-wheel M and cog-wheel N on the shaft of the cylinder C. Thedotted lines on arm H indicateagroovc on the opposite side, in which thewrist-pin of crank I travels. The upper end of arm H is connected to thebed bybars O hinged at I P', as shown. i l

Motion is imparted'to the several parts of the press by power applied toa pulley on thc shaft of cog-wheel M, from which it is transmitted tocog-wheel L,and thence to cog-wheel N, on the shaft ofthe cylinder C.The drawing represents the position of the several parts .just beforecommencing the backward motion of the bed under the cylinder. Pins Sengage withstandards R and start thc bed back, bringing it into positionfor thc cogs of segmental bars G to engage with thc cogs of bars F, bywhich the bed is carried under the` cylinder at the time of makingthejmpression. At the' termination of the stroke the wrist-pin of crankI, which has, in the action above described, been revolved to a positionnearly opposite that shown, engages with the arm II, and returns thc bedforward with a quick movement. The arrows indicate the direction ofrevolution. It is essential to the harmonious movement ofthe severalparts that cog-wheels L and N be of the same diameter or number of cogs.v

A marked advantage of my invention cons ists in the comparativeexemption from liability to make blurred or imperfect impressions, inconsequence ofthe peculiar Inode employed for the conjoint andreciprocal action of the bed and impression-eylinder, and which alsoenables me to dispense with much of the complicated and expensivemachinery usually employed for this purpose.

I claim moving the bed B under the impression-cylindor C, at the time ofmaking the impression, by moans of the pins S and standards R, segmentalcogbars G, and cog-bars F, in combination with the` devices for givingthe return-movement to the bed by means independent of that whichcarriesit under the cylinder, in the mannelll t f tl substantia y as seor 1 HENRY C' CHNDLEL Witnesses:

JAS. N. MAYIIEW, 0. F. Mnrnw.

